388189025 has 72 divisors (see below), whose sum is σ = 587774880. Its totient is φ = 253344000.

The previous prime is 388188989. The next prime is 388189051. The reversal of 388189025 is 520981883.

It is not a de Polignac number, because 388189025 - 2²⁰ = 387140449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2963210 + ... + 2963340.

It is an arithmetic number, because the mean of its divisors is an integer number (8163540).

Almost surely, 2^388189025 is an apocalyptic number.

388189025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

388189025 is a deficient number, since it is larger than the sum of its proper divisors (199585855).

388189025 is a wasteful number, since it uses less digits than its factorization.

388189025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 388189025 is about 19702.5131645686. The cubic root of 388189025 is about 729.4817269594.

The spelling of 388189025 in words is "three hundred eighty-eight million, one hundred eighty-nine thousand, twenty-five".